Vacuum-tube socket



Jan. 12 1926. v i

G.l H. STEVENSON VACUUM TUBE SOCKET Filed Deo. 6, `1920 RAI/7 1 llII ' of New York, have invented certain f Sockets, of which the following is a full,

- thereof.

Patented Jan. .12, 192e.-

' contact member surface thereof.

Ais supported a 1,569,639 UNITED STATES PATENT OFFICE.

GEORGE H. STEVENSON, 0F RYE, NEW YORK, ASSIGNOR TO WESTERN ELECTRIC COM- PANY, INCORPORATED, OF NEW YORK. N. Y., A CORPORATION OF NEW YORK.

VACUUM-TUBE SOCKET.

Application led December 6, 1920. v Serial No. 428,541.v

tubular member 11. Each of the contact members is supported on its strip by means of a terminal 18 which comprises a semicylindrical` portion to which the contact member is riveted and a cylindrical portion extending through the stri of insulating material and being provide with a nut which may be tightened against the insulating strip to hold the terminal in place. The section ot the cylindrical portion of the terminal in contact with the insulating strip is knurled to prevent rotation thereof in the strip. The inner ends of the contact mein- T 0 all whom t may concern Be it known that I, GEORGE H. S'rEvENsoN, a subject of the King of Great Britain (having taken out first papers in U. S.), residing at Rye, in the county of Westchester, State new and useful Improvements 1n Vacuum-'lube clear, concise, and exact description.

This invention relates to sockets for vac uum tubes and more especially to the arrangement of the contact members of a socket to be used in connection with vacuum tubes operating 0n high voltage, high fr@- bers are arranged beneath the tubular memqueney currents, ber 11 1n such a way that the contact mem- It is one Object of this invention t@ prober 13 which is adapted to engage the anode terminal of a vacuum tube is isolated from the rest. The contact members 15 and 17 are adapted to engage the lcathode terminals ot the vacuum tube and their inner ends are slightly curved and serrated. The contact member 16 is arranged to engage the grid terminal of the vacuum tube.

fllhe tubular member 11 is adapted to reany two of the remaining `contact members. 091V@ Vllllm tulp@ 19 having it bes@ 20 An additional object or thel invention is through which projects the anode terminal the Provision of means 01* insuring gogd 21,. bi1@ (lirillOdG tellllllllls 22 and 24 and th@ lContact between the Contact, membps and gli@ telml'ial 23 Of which 21 S isolated TOHL terminals oie the cathode circuit. ThisA obthe @th-GI' three. The terminals 21, 22, 23 ject is accomplished by curving the' tree end of the contactmeinber and roughening the vide a socket for vacuum tubes to be use in high frequency, high voltage circuits in which the various Contact members are ettectively insulated from each other. This object is accomplished by isolating the anode from the other contact members thus providing an insulating space between it and the others greater than between tact members 13, 15, 16 and 17 respectively. ln the tubular member 11 is provided a bayonet slot 25 with which the pin 26 on the base 20 cooperates to hold the vacuum tube in the socket.

The isolation of the anode contact niember 13 trom the other contact members provides a sui'iiciently great insulating space therebetween to eectively prevent discharges from said anode contact member. The serrated condition of the ends ot the cathode members 15 and 17 causes said ends to scrape the terminals 22 and 24 thereby cleaning the cathode terminals and the serrations, insurin the good contact between said member and said terminals necessary to carry the heavy current upon which tubes ot this character are operated. Because ot the tact that the portion of the terminal 18 Other objects and eatures ot this invention will be apparent from the following specification and appended claims.

rllhis invention will be better understood by having reference to the following speciication and accompanying drawings wherein Figure 1 is a pers ective view oi the socket andv a vacuum tu e, Figure 2 is the plan view partially broken away oit the socket and Figure 3 is a section on the line 8-3 of Figure 2.

'llhe socket comprises a casting 10 open at thebottomvand' at the ends and having a tubular member 11 extending from the top One end of the casting 10 is closed 12 of insulating material by which by a strip single contact member 13,

one end of which Vextends beneath the openwhich Passes through the stri of insulating in the tubular member. A strip 14 of ing material is made cylindrica the conceninsulating material closes the opposite en tration of dielectric stresses at the points of support of the contact member is avoided. lt is, of course, understood that various modifications may be made in the structural of the casting and supports the contact members 15, 16 and 17 each of which is arrangedr with one of its ends extending beneath the and 24; are arranged to engage with the con- 15 said tubular portion.

2. A vacuum tube socket comprising an insulating material attached to inverted U-shaped metal base having a tubular portion arising therefrom, a strip of and closing each end of said base, a plurality of contact elements supported by one of said insulating strips, one of said Contact members being shorter than the remainder and the free end of one of said contact members being roughened and -a single contact member supported by said other insulating strip, each of said contact members projectlng beneath said tubular portion.

In vvitness whereof, I hereunto subscribe my name this 26th day of November A. D., 30

GEORGE H. STEVENSON. 

